﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;
using Xceed.Silverlight.Utils;

#if !SILVERLIGHT
using System.Windows;
#endif

namespace Xceed.Silverlight.ListBox.Utils
{
  internal sealed class ContainerConfigurationsInvalidatedManager : WeakEventManager<ContainerConfigurationsBase>
  {
    #region Constructor

    private ContainerConfigurationsInvalidatedManager()
    {
    }

    #endregion

    #region Instance Private Static Property

    private static ContainerConfigurationsInvalidatedManager Instance
    {
      get
      {
        return ContainerConfigurationsInvalidatedManager.LazyInstance.Value;
      }
    }

    private static ContainerConfigurationsInvalidatedManager CreateSingleton()
    {
      var manager = new ContainerConfigurationsInvalidatedManager();

      ContainerConfigurationsInvalidatedManager.SetCurrentManager( manager.GetType(), manager );

      return manager;
    }

    private static readonly Lazy<ContainerConfigurationsInvalidatedManager> LazyInstance = new Lazy<ContainerConfigurationsInvalidatedManager>( ContainerConfigurationsInvalidatedManager.CreateSingleton );

    #endregion

    public static void AddListener( ContainerConfigurationsBase source, IWeakEventListener listener )
    {
      ContainerConfigurationsInvalidatedManager.Instance.AddListenerProtected( source, listener );
    }

    public static void RemoveListener( ContainerConfigurationsBase source, IWeakEventListener listener )
    {
      ContainerConfigurationsInvalidatedManager.Instance.RemoveListenerProtected( source, listener );
    }

    protected override void StartListening( ContainerConfigurationsBase source )
    {
      source.ContainerConfigurationsInvalidated += new EventHandler<ConfigurationChangedEventArgs>( ContainerConfigurationsInvalidatedManager.OnEventRaised );
    }

    protected override void StopListening( ContainerConfigurationsBase source )
    {
      source.ContainerConfigurationsInvalidated -= new EventHandler<ConfigurationChangedEventArgs>( ContainerConfigurationsInvalidatedManager.OnEventRaised );
    }

    private static void OnEventRaised( object sender, ConfigurationChangedEventArgs e )
    {
      ContainerConfigurationsInvalidatedManager.Instance.DeliverEvent( sender, e );
    }
  }
}
